From 718eeb6a2128554b0558ffd0db2fa3b10057baca Mon Sep 17 00:00:00 2001 From: Víctor Paesa Date: Tue, 7 Nov 2006 09:12:20 +0000 Subject: add moving images feature to imlib2 vhook Patch by Victor Paesa % wzrlpy A arsystel P com % Original thread: Date: Jul 30, 2006 12:28 AM Subject: [Ffmpeg-devel] [PATCH] Add moving images feature to imlib2 vhook Originally committed as revision 6929 to svn://svn.ffmpeg.org/ffmpeg/trunk --- vhook/imlib2.c | 168 ++++++++++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 154 insertions(+), 14 deletions(-) diff --git a/vhook/imlib2.c b/vhook/imlib2.c index 331359db63..87c54cf0bf 100644 --- a/vhook/imlib2.c +++ b/vhook/imlib2.c @@ -7,19 +7,48 @@ * is passed through strftime so that it is easy to imprint the date and * time onto the image. * + * You may also overlay an image (even semi-transparent) like TV stations do. + * You may move either the text or the image around your video to create + * scrolling credits, for example. + * + * Text fonts are being looked for in FONTPATH + * * Options: * * -c The color of the text * -F The font face and size * -t The text * -f The filename to read text from - * -x X coordinate to start text - * -y Y coordinate to start text + * -x X coordinate of text or image + * -y Y coordinate of text or image + * -i The filename to read a image from * + * Expresions are functions of: + * N // frame number (starting at zero) + * H // frame height + * W // frame width + * h // image height + * w // image width + * X // previous x + * Y // previous y + * + + Examples: + + FONTPATH="/cygdrive/c/WINDOWS/Fonts/" + FONTPATH="$FONTPATH:/usr/share/imlib2/data/fonts/" + FONTPATH="$FONTPATH:/usr/X11R6/lib/X11/fonts/TTF/" + export FONTPATH + + ffmpeg -i input.avi -vhook \ + 'vhook/imlib2.dll -x W*(0.5+0.25*sin(N/47*PI))-w/2 -y H*(0.5+0.50*cos(N/97*PI))-h/2 -i /usr/share/imlib2/data/images/bulb.png' + -acodec copy -sameq output.avi + + ffmpeg -i input.avi -vhook \ + 'vhook/imlib2.dll -c red -F Vera.ttf/20 -x 150+0.5*N -y 70+0.25*N -t Hello' + -acodec copy -sameq output.avi + * This module is very much intended as an example of what could be done. - * For example, you could overlay an image (even semi-transparent) like - * TV stations do. You can manipulate the image using imlib2 functions - * in any way. * * One caution is that this is an expensive process -- in particular the * conversion of the image into RGB and back is time consuming. For some @@ -27,6 +56,23 @@ * the text into a bitmap and then combine it directly into the YUV * image. However, this code is fast enough to handle 10 fps of 320x240 on a * 900MHz Duron in maybe 15% of the CPU. + + * See further statistics on Pentium4, 3GHz, FFMpeg is SVN-r6798 + * Input movie is 20.2 seconds of PAL DV on AVI + * Output movie is DVD compliant VOB. + * + ffmpeg -i input.avi -target pal-dvd out.vob + # 13.516s just transcode + ffmpeg -i input.avi -vhook /usr/local/bin/vhook/null.dll -target pal-dvd out.vob + # 23.546s transcode and img_convert + ffmpeg -i input.avi -vhook \ + 'vhook/imlib2.dll -c red -F Vera/20 -x 150-0.5*N -y 70+0.25*N -t Hello_person' \ + -target pal-dvd out.vob + # 21.454s transcode, img_convert and move text around + ffmpeg -i input.avi -vhook \ + 'vhook/imlib2.dll -x 150-0.5*N -y 70+0.25*N -i /usr/share/imlib2/data/images/bulb.png' \ + -target pal-dvd out.vob + # 20.828s transcode, img_convert and move image around * * This file is part of FFmpeg. * @@ -59,6 +105,20 @@ #include #include #include +#include "eval.h" + +const char *const_names[]={ + "PI", + "E", + "N", // frame number (starting at zero) + "H", // frame height + "W", // frame width + "h", // image height + "w", // image width + "X", // previous x + "Y", // previous y + NULL +}; static int sws_flags = SWS_BICUBIC; @@ -68,9 +128,14 @@ typedef struct { char *text; char *file; int r, g, b; - int x; - int y; + double x, y; + char *fileImage; struct _CachedImage *cache; + Imlib_Image imageOverlaid; + AVEvalExpr *eval_x, *eval_y; + char *expr_x, *expr_y; + int frame_number; + int imageOverlaid_width, imageOverlaid_height; // This vhook first converts frame to RGB ... struct SwsContext *toRGB_convert_ctx; @@ -96,6 +161,12 @@ void Release(void *ctx) av_free(ci->cache); } if (ctx) { + if (ci->imageOverlaid) { + imlib_context_set_image(ci->imageOverlaid); + imlib_free_image(); + } + ff_eval_free(ci->expr_x); + ff_eval_free(ci->expr_y); sws_freeContext(ci->toRGB_convert_ctx); sws_freeContext(ci->fromRGB_convert_ctx); av_free(ctx); @@ -110,16 +181,30 @@ int Configure(void **ctxp, int argc, char *argv[]) char *fp = getenv("FONTPATH"); char *color = 0; FILE *f; + char *p; *ctxp = av_mallocz(sizeof(ContextInfo)); ci = (ContextInfo *) *ctxp; + ci->x = 0.0; + ci->y = 0.0; + ci->expr_x = "0.0"; + ci->expr_y = "0.0"; + optind = 0; + /* Use ':' to split FONTPATH */ if (fp) + while (p = strchr(fp, ':')) { + *p = 0; + imlib_add_path_to_font_path(fp); + fp = p + 1; + } + if ((fp) && (*fp)) imlib_add_path_to_font_path(fp); - while ((c = getopt(argc, argv, "c:f:F:t:x:y:")) > 0) { + + while ((c = getopt(argc, argv, "c:f:F:t:x:y:i:")) > 0) { switch (c) { case 'c': color = optarg; @@ -134,10 +219,13 @@ int Configure(void **ctxp, int argc, char *argv[]) ci->file = av_strdup(optarg); break; case 'x': - ci->x = atoi(optarg); + ci->expr_x = av_strdup(optarg); break; case 'y': - ci->y = atoi(optarg); + ci->expr_y = av_strdup(optarg); + break; + case 'i': + ci->fileImage = av_strdup(optarg); break; case '?': fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]); @@ -145,6 +233,7 @@ int Configure(void **ctxp, int argc, char *argv[]) } } + if (ci->text || ci->file) { ci->fn = imlib_load_font(font); if (!ci->fn) { fprintf(stderr, "Failed to load font '%s'\n", font); @@ -152,6 +241,7 @@ int Configure(void **ctxp, int argc, char *argv[]) } imlib_context_set_font(ci->fn); imlib_context_set_direction(IMLIB_TEXT_TO_RIGHT); + } if (color) { char buff[256]; @@ -185,6 +275,29 @@ int Configure(void **ctxp, int argc, char *argv[]) } } imlib_context_set_color(ci->r, ci->g, ci->b, 255); + + /* load the image (for example, credits for a movie) */ + if (ci->fileImage) { + ci->imageOverlaid = imlib_load_image_immediately(ci->fileImage); + if (!(ci->imageOverlaid)){ + av_log(NULL, AV_LOG_ERROR, "Couldn't load image '%s'\n", ci->fileImage); + return -1; + } + imlib_context_set_image(ci->imageOverlaid); + ci->imageOverlaid_width = imlib_image_get_width(); + ci->imageOverlaid_height = imlib_image_get_height(); + } + + if (!(ci->eval_x = ff_parse(ci->expr_x, const_names, NULL, NULL, NULL, NULL, NULL))){ + av_log(NULL, AV_LOG_ERROR, "Couldn't parse x expression '%s'\n", ci->expr_x); + return -1; + } + + if (!(ci->eval_y = ff_parse(ci->expr_y, const_names, NULL, NULL, NULL, NULL, NULL))){ + av_log(NULL, AV_LOG_ERROR, "Couldn't parse y expression '%s'\n", ci->expr_y); + return -1; + } + return 0; } @@ -256,7 +369,20 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, char *tbp = ci->text; time_t now = time(0); char *p, *q; - int x, y; + int y; + + double const_values[]={ + M_PI, + M_E, + ci->frame_number, // frame number (starting at zero) + height, // frame height + width, // frame width + ci->imageOverlaid_height, // image height + ci->imageOverlaid_width, // image width + ci->x, // previous x + ci->y, // previous y + 0 + }; if (ci->file) { int fd = open(ci->file, O_RDONLY); @@ -276,19 +402,32 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, } } - strftime(buff, sizeof(buff), tbp ? tbp : "[No data]", localtime(&now)); + if (tbp) + strftime(buff, sizeof(buff), tbp, localtime(&now)); + else if (!(ci->imageOverlaid)) + strftime(buff, sizeof(buff), "[No data]", localtime(&now)); - x = ci->x; + ci->x = ff_parse_eval(ci->eval_x, const_values, ci); + ci->y = ff_parse_eval(ci->eval_y, const_values, ci); y = ci->y; + if (!(ci->imageOverlaid)) for (p = buff; p; p = q) { q = strchr(p, '\n'); if (q) *q++ = 0; - imlib_text_draw_with_return_metrics(x, y, p, &wid, &hig, &h_a, &v_a); + imlib_text_draw_with_return_metrics(ci->x, y, p, &wid, &hig, &h_a, &v_a); y += v_a; } + + if (ci->imageOverlaid) { + imlib_context_set_image(image); + imlib_blend_image_onto_image(ci->imageOverlaid, 0, + 0, 0, ci->imageOverlaid_width, ci->imageOverlaid_height, + ci->x, ci->y, ci->imageOverlaid_width, ci->imageOverlaid_height); + } + } ci->fromRGB_convert_ctx = sws_getCachedContext(ci->fromRGB_convert_ctx, @@ -306,5 +445,6 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, picture1.data, picture1.linesize, 0, height, picture->data, picture->linesize); + ci->frame_number++; } -- cgit v1.2.3